Hello, I'm trying to use the following "bed4" dataframe as an input to chromPlot. I made it of the exact same type as shown for "bands" in the chromPlot documentation (same column names & types), however chromPlot does not display any line on chr19. What am I doing wrong? Thanks a lot.

bed4 Chrom Start End Name Colors 1 chr19 41717658 41718208 CEACAM5 red 2 chr19 15641585 15643966 CYP4F3 red 3 chr19 41710010 41717487 CEACAM5 red 4 chr19 41730403 41730450 AC243967.1 red 5 chr19 41730455 41731215 AC243967.1 red 6 chr19 41731203 41731232 AC243967.1 red 7 chr19 41727618 41727644 CEACAM5 red 8 chr19 17809016 17809079 B3GNT3 red

chromPlot(gaps=hg_gap,bands=bed4) Chrom 19 : 52143068 bp